Mug decoration



FIG. 1 is a right side view of a mug decoration of the present invention;

FIG. 2 is a front view of the mug decoration of FIG. 1; and,

FIG. 3 is a rear view of the mug decoration of FIG. 1.

The broken line showing of a mug in FIGS. 1-3 is for illustrative purposes only and forms no part of the claimed design. The left side view is a mirror image of the right side. 

The ornamental design for a mug decoration, as shown and described. 